[SOLVED] Formatting a MacBook Air?

I know this may seem like a stupid question but I have never really had much to do with Apple.
I am thinking about buying one for just a computer on the go but I noticed it had no disc drive on/in it. How would you go about formatting it? Does it come with a USB restore or something?
Thanks in advance.
Answer #1
this was copied and pasted
This is how its done:
 
It works on Mac OS X Lion only.
 
1. Launch the Terminal application on you Mac. Then run the following sequence of commands (one at a time):
sudo su
dscl . -delete /Groups/admin GroupMembership yourAccountNameHere
dscl . -delete /Users/yourAccountNameHere
2. Now reboot your Mac into single-user mode by holding Command-S at startup.
 
3. Once booted into single-user mode, run the following sequence of commands (one at a time):
/sbin/fsck -fy
/sbin/mount -uw /
rm -R /Users/yourAccountNameHere
cd /var/db/
mv .AppleSetupDone .RunLanguageChooserToo
rm -R /Library/Caches/*
rm -R /System/Library/Caches/*
rm -R /var/vm/swapfile*
reboot
Your Mac will reboot to the start of the initial Apple Setup program just like when you first powered it on after purchase. All clean and ready to sell or give to a new user.
OP is here with another option or two to restore/format
https://discussions.apple.com/thread/3269952?start=0&tstart=0
Answer #2
Thanks, mate.